For a technology-based citation to have full legal validity, the system must meet strict technical and legal requirements defined by CONTRAN and by the case law of Brazilian courts [1].
Mandatory Technical Requirements
| Requirement | Minimum Specification | Function |
|---|---|---|
| OCR confidence | 95%+ in plate identification | Avoid false positives |
| Timestamp | Accuracy of ±1 second, synchronized with NTP | Prove the exact time |
| Geolocation (GPS) | Accuracy of ±5 meters | Prove the location |
| Photographic record | Legible image of the plate and context | Visual evidence |
| Chain of custody | Immutable and traceable data | Prevent tampering |
| Calibration | Valid equipment certificate | Ensure accuracy |
The Areatec Standard: AreaChain
The Areatec ecosystem goes beyond the minimum requirements with AreaChain — a proprietary blockchain system that ensures:
- Immutability: Once recorded, the evidence cannot be altered
- Traceability: Each data point has an identified origin, time, and responsible party
- Auditability: Any party can verify the integrity of the data
- Legal validity: Meets the ICP-Brasil requirements for electronic documents
What Happens If Accuracy Is Insufficient
If the system does not reach the confidence threshold (95%), the reading is automatically discarded and no citation is generated. This protects the driver against false positives and ensures that only robust evidence is used [2].
Areatec's Aretron operates with an accuracy rate above 98% under normal conditions, well above the legal minimum required.